5 research outputs found
KomplexnĂ geochemickĂ˝ vĂ˝zkum interakcĂ a migracĂ organickĂ˝ch a anorganickĂ˝ch látek v horninovĂ©m prostĹ™edĂ:PrĹŻbÄ›h hydrodynamickĂ˝ch zkoušek na vrtech PTP3 a PTP4 na lokalitÄ› PotĹŻÄŤky - PodlesĂ
Popis terĂ©nnĂch pracĂ na obou vrtech - dokonÄŤenĂ vodnĂch tlakovĂ˝ch zkoušek v prĹŻbÄ›hu vrtánĂ na vrtu PTP-3, instalace multipakrovĂ©ho systĂ©mu a následnĂ˝ monitoring tlakĹŻ v jednotlivĂ˝ch etážĂch na vrtu PTP-3, vodnĂ tlakovĂ© zkoušky v prĹŻbÄ›hu vrtánĂ na pozdÄ›ji zhavarovanĂ©m vrtu PTP-4, hydrodynamickĂ© zkoušky v prĹŻbÄ›hu vrtánĂ, dlouhodobĂ© hydrodynamickĂ© zkoušky, stopovacĂ zkoušky
Hydrogeology of the deepest underwater cave in the world: Hranice Abyss, Czechia
Little is known about water mixing in deep underwater cave shafts of hypogene karst. The Hranice Abyss (HA) in Czechia is currently the deepest underwater cave in the world. It shares a thermal and CO2-rich water source with an adjacent spa. Based on chemical and isotope composition, water in the HA is a mixture of shallow and thermal groundwaters. The shallow local groundwater is distinctly different from the adjacent Bečva River water in its elemental chemistry and sulfate δ34S values. The thermal water is mixed with 5–10% of modern water, based on tritium content and chlorofluorocarbons. Vertical profiling and deep sampling in the HA showed distinct changes with depth in temperature and TDS. Density-driven flow controls the mixing. In winter, the shallow water of the open HA lake is efficiently cooled; the denser surface water sinks to greater depths, which mixes the water column in the HA. During the summer the shallow water stagnates at the depth of 0–15 m. Periods of stagnation and of accelerated water flow and mixing in the HA perfectly fit with the periodic occurrence of CO2 evasion in the lake and the overall characteristics of the microbial communities, which showed the absence of any functional stratification. Ferric oxyhydroxide precipitation is the major cause for turbidity in the HA. Elevation-specific hydraulic responses of the HA groundwater, caused by the adjacent river’s level pulses, enabled a determination of the points along the river course at which the river is connected to groundwater by karst conduits
VĂ˝voj metodiky identifikace a matematickĂ©ho modelovánĂ proudÄ›nĂ a geochemickĂ© interakce v rozpukanĂ©m prostĹ™edĂ kompaktnĂch hornin:Etapová zpráva Programu státnĂ podpory vĂ˝zkumu a vĂ˝voje MĹ˝P za rok 2003
CĂlem projektu je vĂ˝voj komplexnĂ metodiky zjišťovánĂ a parametrickĂ©ho vyjádĹ™enĂ proudÄ›nĂ podzemnĂ vody a geochemickĂ© interakce v puklinovĂ©m prostĹ™edĂ ÄŚeskĂ©ho masivu. Metodika zahrnuje metody terĂ©nnĂho a laboratornĂho vĂ˝zkumu a matematickĂ© modelovánĂ. HlavnĂ oblasti plánovanĂ©ho vĂ˝zkumu jsou 1. TerĂ©nnĂ hydrodynamickĂ© a interferenÄŤnĂ testy na vĂ˝zkumnĂ˝ch vrtech hlubokĂ˝ch cca 300 m. 2. StanovenĂ hydraulickĂ˝ch, geologickĂ˝ch a geochemickĂ˝ch vlastnostĂ rozpukanĂ˝ch kompaktnĂch hornin a podzemnĂ vody na základÄ› syntĂ©zy a analĂ˝zy vĂ˝sledkĹŻ terĂ©nnĂch a laboratornĂch vĂ˝zkumĹŻ. 3. MatematickĂ© modelovánĂ proudÄ›nĂ a transportu v ucelenĂ© hydrogeologickĂ© struktuĹ™e puklinovĂ©ho prostĹ™edĂ granitovĂ©ho masivu s dvojĂ pĂłrovitostĂ, s vyuĹľitĂm vĂ˝sledkĹŻ terĂ©nnĂho a laboratornĂho vĂ˝zkumu